I got the following error out of sudden:


I swear I did not touch the project settings! It had run well the previous time, but not anymore now! I did a google search and it baffled me to read how many problems could cause this and what the possible solutions are.

I finally nailed it: it was caused by a key in info.plist file which had no value: "Icon file". Below it is a another key: "Icon files" having value of an icons array.

I deleted that Icon file key and the project runs well again. But that problem could have easily been caused by many other factors.... the error message does not help at all!